Cooling and drying meal



.Patented Apri' 20. 1858.

J. DENCHFIELD.

Mill Bolt.

UNITED sTATEs 'PATENT OFFICE.

JOHN DEUCHFIELD, OF .'OSWEGO, NEW YORK.

COOLING AND DRYING MEAL.

Specication forming part of Letters Patent No. 19,984, dated April 20,18158; Reissued January To all whom it may concern:

Be it known that I, J oHN DEUCHEIELD, of Oswego, in the county of Oswegoand State of New York, have invented a new and Improved Arrangement ofMeans for Cooling and Drying Meal During its Passage from theGrinding-Stones to the Bolts; and I do hereby declare that the followingis a full, clear, and eXact description of the same, reference being hadto the annexed drawings, making a part of this specification, in which-Figure l, is a vertical section of my improvement taken in the line(0c), Fig. 2. Fig. 2, is also a vertical section taken in the line (y)(y) Fig. l.

Similar letters of reference indicate corresponding parts in the twofigures.

This invention consists in the peculiar arrangement of a suction fan,conveyers and elevators, as hereinafter described whereby the mealduring its passage from the grinding stones to the bolts is thoroughlycooled and dried within a limited space, the whole forming a simple andeconomical device.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A, represents mill stones and A, are the curbs. The stones are arrangedin the ordinary way.

B, represents the bed on which the stones are placed.

C, represents the spouts which convey the meal from the stones and D, isa chest which is placed horizontally on the flooring E, and with whichthe lower ends of the spouts C, communicate, as shown at (a) in bothIigures.

Within the chest D a longitudinal shaft F, is placed, said shaft havinga spiral flanch (b), on it as shown clearly in Fig. 1. The chest D, isequal in length to the bed B, so that all the spouts C, of the severalstones A, may communicate with it. Within the chest D, there is alsoplaced a zig-zag partit-ion E provided with openings (c) having sides(d), and with one end of the chest D, elevators F,communicate,saidelevators discharging their-contents at (c) as shown in Fig. 2.

G, is a fan which is placed within a suitable boX H. The boX I-Icommunicates with a spout I, the lower end of which communicates withone end of the chest D, as shown at (f). The upper end of the spout I,communicates with one end of a chest J, as shown at The chest J,contains a lo-nitudinal shaft K, having a screw o-r spiral' anch on itas plainly shown in Fig. l, and within the chest J, a series of verticalplates (i) is placed and arranged as clearly shown in Fig. l, to form azig-zag passage as indicated by the arrows 1. The end of the chest J,opposite to that where the spout I, cognnunicates is provided with anopening y Both shafts F, K, are rotated by any proper means in thedirection indicatedv by the arrows 2.

The operation is as follows: The meal passes from the stones A, down thespouts C, and into the lower part of the chest D, and is conveyed to thespirally ianched shaft F, into the elevators F the shaft F, which is .aconveyer moving the meal in the direction indicated by the arrows 3. Themeal is carried up by the elevators and discharged .at (e) directly intothe bolts or into troughs and may be conveyed by hopper-boys or anysuitable conveying device into the bolts.

While the meal is thus passed through the' stones A, spouts C, and thechest D, a suction blast is produced bythe fan G, said blast absorbingthe moisture or vapor which the meal contains and which is heated orwarmed by the friction of the stones A. The meal therefore is dried andcooled and the meal in consequence o f the time consumed during itspassage through the spouts C, and chest D, will be perfectlyacted uponby the blast so that all free moisture will be absorbed. A portion ofthe finer and lighter particles of flour will follow the blast and willbe ejected up through the spout I, and through the serpentine or windingpassage formed by the parts (i) and will settle 1n the outer end of thechest J, and conveyed by the conveyer or flanched shaft K, to a spout(j) through which it falls into the elevators F, and unites with themeal which is received by the elevators direct from the chest D.

I do not claim forcing a current of air between a pair of millstoneswhile the same is in operation, for the purpose of keeping the stones ina e001 state and preventing the I claim therefore as new and desire toseheating of the grain for such means, cure by Letters Patentalthoughnot very efcient, have been previ- The arrangement and combination ofthe ously used, but I am not aware that parts chests D, J, shafts F, K,elevators F1, fan G,

5 arranged as herein shown so as to allow the and spout I, substantiallyas and for the 15 meal to be subjected to the blast during its purposeherein shown and described. ent-ire or nearly entire passage from the-JOHN DEUCHFIELD. stones to the bolts, and insure the perfect Witnesses:cooling and drying of the meal, have been y THOMAS WATERS,

10 previously used. MIGHL KELLY.

